A. Authority To Close Streets Or Highways: City personnel or contractors, while repairing or improving the streets or highways of the city, and city personnel and utility companies when installing, improving or repairing lines or other utility facilities in the streets or highways are authorized, as necessary, subject to control by the city council, to close any street or highway or section thereof to traffic during such repair, maintenance or construction; and in exercising such authority, shall erect or cause to be erected proper control devices and barricades to warn and notify the public that the street or highway has been closed to traffic.
B. Compliance By Drivers Required: When any street or highway has been closed to traffic under the provisions of subsection A of this section and traffic control devices or barricades have been erected, it is unlawful for any person to drive any vehicle through, under, over or around such traffic control devices or barricades or otherwise to enter the closed area; except, that the provisions of this subsection shall not apply to persons while engaged in such construction, maintenance and repair, or to persons entering therein for the protection of lives or property; provided further, that persons having their places of residence or places of business within the closed area may travel, when possible to do so, through the area at their own risk.
C. Warning Devices: Whenever construction, repair or maintenance of any street, highway or utility line or facility is being performed under traffic, the city personnel, contractor or utility company concerned shall erect or cause to be erected traffic control devices to warn and guide the public; and every person using such street or highway shall obey all signs, signals, markings, flagmen or other traffic control devices which are placed to regulate, control and guide traffic through the construction or maintenance area. (2002 Code § 10.04.100)